Quantum mechanics

Engineering

Metallurgy

Materials science

Geomorphology

Ceramic

Stability (learning theory)

Energy (signal processing)

Power (physics)

Lead (geology)

Computer science

Geology

Thermodynamics

Physics

Energy storage

Energy density

Machine learning

Engineering physics

Chemical Engineering Journal

Superior high-temperature stable dielectric ceramics with high energy density and power density are promising materials for the pulse power capacitor applications. A high dielectric constant of 1568 ± 15% at an ultra-wide temperature range of 60–600 °C was achieved in novel 0.93Na0.5Bi0.5TiO3-0.07LiTaO3 (0.93NBT-0.07LT) lead-free ceramics via LiTaO3 modification and composition engineering. Furthermore, 0.9NBT-0.1LT ceramics possess a high energy storage density of 3.1 J/cm3, a high η of ~74.2% and a high Eb of 200 kV/cm. 0.9NBT-0.1LT ceramics also show a high pulse discharge energy density (WD) of 0.51 J/cm3, a large power density (PD) of 22 MW/cm3 and a rapid discharge duration of 100 ns over a wide temperature range of 30–150 °C, which is suitable for the pulse power applications. Compared with other lead-free ceramics reported so far, a significant difference is that the high energy density and power density are achieved in 0.9NBT-0.1LT ceramic simultaneously. This study provides an original strategy for high temperature stable ceramics in pulse capacitor applications.

Novel Na0.5Bi0.5TiO3 based, lead-free energy storage ceramics with high power and energy density and excellent high-temperature stability